this pair of pants ___ big and the pants there___ small.A,is

this pair of pants ___ big and the pants there___ small.A,is This is a pair of pants.和they are pants. --How much ___ this pair of pants? --___ 30 dollars. A.is It This pair of pants is nice.Can I ___?A.put on them.B.put up This pair of pants is().Can I()? a pair of brown pants this pair of pants is 20yuan.为什么用is? This pairof ____ is yellow and that pair of pants _____ blac This pair of pants is a little short for me. Please give me This pair of pants .为什么不用these a pair of pants 后面用is还是are a pair of pants和pants的问题